Requesting success message filter in copier_process_copy() function

Hello:

I'm extending this plugin for use in our multisite by adding a few more Site_Copier parent classes to copy over in the cloning process.

It'd be helpful if I could add my own success message for each process. I've done this now by changing line 526-529 of copier.php to the following:

return array(
            'error' => false,
            'message' => apply_filters( 'copier_success_message_' . $copy , $message )
        );

Do you think this change could be included for future releases?